Google Slumps Below 50-Day Moving Average; It’s Not the Only One

The percentage of S&P 500 companies trading above their 50-day moving average has fallen to about 66%.

Google fell under its 50-day moving average on Thursday, and is under it again on Friday. It's not the only one.

Google shares were down another 1.5% today to $783, below its 50-day moving average of $796. A larger number of its peers in the S&P 500 are joining it under that level, and the drop is one more sign that the bull run that began in November is wearing itself out.

These moving average are technical markers that can have some significance, and which chart watchers keep an eye on to look for signs of growing weakness. Google hasn't been under the mark since mid-December, a period during which the stock jumped about 21% through early March, to about $840, before the recent downdraft started.